Collapsible core.



A. ADAMSON.

COLLAPSIBLE CORE.

APPLICATION FILED lAN.7,1915. RENEWED FEB. 21. 1916.

Patented Apr. 4, 1916.

ALEXANDER ADAMSON, 0F AKRON, OHIO.

Specification of Letters Patent.

CO13LAPSIBLE CORE.

Patented A r. 4, 1916.

Application filed January 7, 1915, Serial No. 975. Renewed February 21, 1916. Serial No. 79,798.

To all whom it may concern:

Be it known that I, ALEXANDE ADAMsoN,

-a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Collapsible Cores, of which the following is a specification.

This invention relates to improvements in collapsible cores for the manufacture of tire shoes or casings of double tube pneumatic tires, and the primary object of the invention resides in the means employed for holding and locking the sections of the core body in assembled relation, said means being effectual for the purpose, easily operated to insure perfect alinement of the core sections when assembled, and providing means for the ready collapsin of the core.

With the foregoing and other objects in view, the invention consists in the novel construction, combination and arrangement of parts constituting the invention to be hereinafter specifically described and illustrated in the accompanying drawings which form a part hereof wherein is shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the matter hereinafter 'claimed.

core assembled embodying this invention Fig. 2, is a side elevation of a ring employed in assembhng a core; Fig. 3, 1s a view partly in section and partly 1n perspective of one of the interlocking members attached to one section of the core; Fig. 4, is a view similar to Fig. 3 of the complementary interlocking member of the core; and, Fig. 5, is a transverse sectional view of a core on line X, X of Fig. 1.

A ring core embodying this invention is customarily constructed of a plurality of segment-shaped sections which when united together. as hereinafter described constitute an annulus, the outer and lateral faces of which areshaped to impart a preferred configuration to the corresponding inner face of the tire or tire shoe which is to be. manufactured thereon. The sections which'are employed to form the annular core are designated in the drawing by the reference numerals 1, 2, 3 and 4 and are provided with inwardly extending flanges 5. These flanges are all similar and may be, if desired, provided on their inner lateral faces with laterally-projecting ribs 6. The junction lines 7 between the ends of the section 1 and the sections 2 and 3 are so inclined that the member 1 is substantially wedge-shaped to constitute a kev-forming member. The joints between the sections'2, 3 and 4 are ap proximately radial with respect to the assembled core. The means for interlocking the ends of contiguous sections together are all identical and hence, a description of one is believed to be sufficient for the understanding of the invention and the description will be confined to the interlocking of one end of section 1 with the contiguous end of the section 2. The end of the section 2 is provided with a recess 8 extending centrally of the core body from the inner face of the flange 5 and terminating near the outer face or perimeter of the core body. Mounted in this recess is a member 9 the main portion of which is narrower than thedepth of the rece'ss8 and is secured thereon by means of hold-fast devices 10. The outer end of the member 9 is provided with a head 11 the lateral face of which is approximately flush with the end of the core section, and between the head 11 and the body portion 9 of this member is an inclined shoulder 12 which extends transversely of the member 9.

The contiguous end of the section 1 is provided with a centrally-positioned recess 13 which extends from the inner face of the flange 6 outwardly and from which extends and at right angles thereto a second recess or pocket 14. Adapted'to be positioned in the recesses 13 and 14 is a T-shaped member 15 of a greater width than the depth of the re cess so as to project therefrom and which is secured in position through the means of hold-fast devices 16. The outer end of the member 15 is provided with an inclined face 17 for a purpose to be later described. The

the recess 14 is a threaded opening in which" is positioned a set screw 20 of considerably pose to be later described. 7

In assembling a core constructed in accordance with this invention, the sections of the core which are provided at their ends with the members 15 are moved radially outwardly so that the inclined ends 17 of these members will interlock with the in-' clined shoulders 12 of the members 9 and prevent further outward movement of these members, thus setting up interengaging union between contiguous ends of the core sections. After assembling of the core and interlocking of the ends as just described, the ring 22 is forced into position against the inner faces of the flanges 6 which serves to wedgethe members outwardly as far as they are capable of going, and thereby perfectly alining the members of the core circumferentially and at the same time the members 15 serve to prevent any lateral distortion of the core sections. The groove 21- in the inner face of the ring 22 is provided. to enable the pointed ends of the chuck to engage therein during the building up of a tire. In cases where the outer inclined ends of the member 15 and the shoulders 12 become worn so that in use the sections which are provided with the members 15 are inclined to get out of alinement due to the wear on the interlocking members one or more of the lining strips 21 are removed and the member 15 shifted farther into the recess 13. This shifting may be accomplished by manipulating the set screw 20 which engages only one wall of the recess 19 and acts as a wedge for shifting the position of the member 15. At the same time the hold-fast devices 16 may be used for securelv holdin the member 15 in position.

I claim 1. A collapsible core for the manufacture of tire shoes or casings comprising a series of segment shaped. sections adapted to be assembled into a circular core with their ends abutting against each other and each section formed with an inwardly-inclined flange, said sections provided with interengaging means at the ends thereof, said interengaging means embodying a hook-shaped lug at one end of one section, and a lug provided with a portion fashioned to engage said hoolrshaped lug on the contiguous end of a coadjacent section, and a ring positioned within said core and adapted to bear outwardly against the inner faces of the flanges to force the sections outwardly and into circumferential registration.

2. A collapsible core for the manufacture of tire-shoes or casings comprising a series of segment-shaped sections adapted to be assembled into a circular core with their ends abutting against each other and each section formed with an inwardly'inclined flange, said sections provided with interen gaging means at the ends thereof, said inter engaging means embodying a hook-shaped adjustable lug at one end of one section, and an adjustable lug provided with a portion fashioned to engage said hook-shaped lug on the contiguous end of a coadjacent section, and a ring positioned within said core and adapted to bear outwardly against the inner faces of the flanges to force the sections outwardly into circumferential registration.

3. A collapsible core for the manufacture of tire-shoes or casings comprising a series of segment shaped sections adapted to be assembled into a circular core with their ends abutting against each other and each section formed with an inwardly-extending flange, said sections provided with interengaging means at their ends, said interengaging means embodying a hook-shaped lug having an inclined portion at one end of one section, and a lug on the contiguous end of a coadjacent section, and provided with an inclined portion adapted to interengage with the lug on the first section, and a ring positioned within said core and adapted to bear against the inner faces of the flanges to force the sections outwardly into complete circumferential registration.

4. A collapsible core for the manufacture of tire-shoes or casings comprising a series of segment shaped sections adapted to be assembled into a circular. core with their ends abutting against each other and each section formed with an inwardly-extending flange, said sections provided with interengaging means at their ends, said interengaging means embodying a hook-shaped lug on one section and a complemental lug on a coadjacent section, said lugs adapted to interengage, a stem on one of said lugs projecting into the core body, an outwardly movable member engaging said stem for shifting and locking said stem and lug in position, and a ring positioned within said core and adapted to bear against the inner faces of the lugs to force the sections outwardly and into circumferential registration.

5. A collapsible core for the manufacture of tire-shoes or casings comprising a series of segment'shaped sections adapted to be assembled into a circular core with their ends abutting against each other and each section formed with an imvardly-extending \vardlyand into complete circumferential 10 flange. szud sections provided with mterenregistratlon. gaging means at the ends thereof, said 111- In testimony whereof I have hereunto set tel-engaging means embodying a pair oflugs my hand in presence of two subscribing ouch of whlch is mounted on the opposmg witnesses.

end of a section. said lugs fashioned to in ALEXANDER r-kDAhibOh.

terlook. and a ring positioned Within said Witnesses: core and adapted to bear agzunst the lnner C. E. HUMPHREY, faces of the flanges to ioroe the sections out- A. L. MCCLINTOCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

